WO2016002472A1 - 液体供給ユニット及び液体噴射装置 - Google Patents

液体供給ユニット及び液体噴射装置 Download PDF

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Publication number
WO2016002472A1
WO2016002472A1 PCT/JP2015/066914 JP2015066914W WO2016002472A1 WO 2016002472 A1 WO2016002472 A1 WO 2016002472A1 JP 2015066914 W JP2015066914 W JP 2015066914W WO 2016002472 A1 WO2016002472 A1 WO 2016002472A1
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WO
WIPO (PCT)
Prior art keywords
liquid
liquid supply
unit
pressure
control valve
Prior art date
Application number
PCT/JP2015/066914
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
奥野　徳次郎
木村　仁俊
Original Assignee
セイコーエプソン 株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by セイコーエプソン 株式会社 filed Critical セイコーエプソン 株式会社
Priority to EP15815636.4A priority Critical patent/EP3138690B1/en
Publication of WO2016002472A1 publication Critical patent/WO2016002472A1/ja
Priority to PH12016502157A priority patent/PH12016502157A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17506—Refilling of the cartridge
    • B41J2/17509—Whilst mounted in the printer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1266—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0675—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever
    • G05D16/0683—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • B41J2002/17516—Inner structure comprising a collapsible ink holder, e.g. a flexible bag

Definitions

  • the present invention relates to a liquid ejecting apparatus such as an ink jet printer, and a liquid supply unit that supplies liquid in the apparatus.
  • An example of a liquid ejecting apparatus is an ink jet type that has a liquid ejecting head mounted on a carriage that scans a recording medium, and ejects an ink, which is an example of a liquid, from a nozzle opening of the liquid ejecting head toward the recording medium
  • Printers are known.
  • Such a printer has, for example, a liquid supply source constituted by a container having an air communication passage, and supplies the liquid from the liquid supply source to the liquid jet head through the liquid flow path. And, by adjusting the water head difference of the liquid by the position of the nozzle opening in the liquid jet head and the position of the liquid surface in contact with the atmosphere in the liquid supply source, stable liquid supply is realized (for example, , Patent Document 1).
  • the liquid level in contact with the air in the liquid supply source Needs to be lower than the position of the nozzle opening in the liquid jet head. Therefore, the container as the liquid supply source may be a large volume container whose liquid level in contact with the atmosphere may be higher than the position of the nozzle opening in the container having the air communication passage, or the inside may be sealed. In the case of a flexible container, there is a problem that the container having a difference in height can not be used, and the user can not freely select the liquid supply source.
  • An object of the present invention is to provide a liquid supply unit and a liquid ejecting apparatus capable of stably supplying a liquid from a liquid supply to a liquid ejection head without being limited to the volume and form of the liquid supply. is there.
  • a liquid supply unit is configured to be connectable to a supply flow path for supplying liquid to a liquid jet head having a pressure control valve portion and having a nozzle opening for jetting liquid. .
  • the pressure control valve unit includes a liquid outlet connectable to the upstream end of the supply flow channel, a liquid inlet for introducing the liquid supplied from a liquid source storing the liquid, the liquid outlet, and A pressure chamber respectively communicating with the liquid inlet, wherein at least a part of the pressure chamber is formed by a flexible portion configured to be deformed by a pressure change in the pressure chamber; A biasing member configured to bias the flexible portion in a direction in which the volume of the pressure chamber increases, and the liquid is supplied from the liquid supply source in response to the deformation of the flexible portion. And an on-off valve configured to allow it to be introduced into the pressure chamber.
  • a liquid ejecting apparatus includes the liquid supply unit configured as described above, and a liquid ejecting unit including the liquid ejecting head.
  • FIG. 2 is a schematic cross-sectional view of a liquid introducing unit in the liquid supply unit of FIG. 1.
  • FIG. 2 is a schematic cross-sectional view of a pressure control valve unit in the liquid supply unit of FIG. (A) and (b) are schematic sectional drawings which show the transition state of operation
  • FIG. 7 is a schematic view of a liquid ejecting apparatus and a liquid supply source according to a second embodiment.
  • FIGS. 1 to 4 a first embodiment of a liquid ejecting apparatus provided with a liquid supply unit will be described according to FIGS. 1 to 4.
  • an ink jet printer that performs printing by ejecting ink, which is an example of a liquid, onto a target such as paper is illustrated as an example of a liquid ejecting apparatus.
  • the liquid ejecting apparatus 11 includes an apparatus main body 12 as a liquid ejecting unit installed on the floor F, and a liquid supply unit 13 provided outside the apparatus main body 12.
  • a support device 15 supporting an ink pack 14 which is an example of a liquid supply source for the liquid ejecting apparatus 11 is disposed on the side of the liquid ejecting apparatus 11.
  • the support device 15 includes a base 16 installed on the floor F, and a post 17 extending vertically upward from the center of the base 16.
  • a holding fitting 18 is provided on the upper portion of the support column 17.
  • the holding fitting 18 holds a substantially L-shaped support arm 19 extending in the horizontal direction with respect to the support column 17 at a predetermined height.
  • the ink pack 14 is supported in a suspended state with respect to the support arm 19.
  • the ink pack 14 is a closed-type flexible container formed in a bag shape with a flexible film, and mainly includes a pack body 20 that elastically deforms with the increase and decrease of the liquid (ink) contained therein. Is configured.
  • a liquid supply port forming member 22 having a fixed shape is attached to the mouth 21 of the pack body 20, and the liquid supply port forming member 22 is formed with a hole 23 through which the support arm 19 of the support device 15 can be inserted. ing. Then, the support arm 19 is inserted into the hole 23 so that the ink pack 14 is supported so that the pack body 20 vertically hangs down with respect to the support device 15 with a height difference.
  • the position of the pressure head of the liquid contained in the ink pack 14 substantially corresponds to the position where the pack body 20 is most expanded in the horizontal direction in the state as shown in FIG. Then, as the liquid contained in the inside is drawn out through the liquid supply port forming member 22, the most expanded position of the pack body 20 moves downward, so that the position of the pressure head is also lowered. Move to
  • a reaction force of the film force to press the inside of the ink pack 14 acting in the direction in which the volume in the ink pack 14 is reduced acts.
  • the initial pressure head position is higher than the position where the pack body 20 is most expanded in the horizontal direction.
  • the liquid contained in the pack body 20 of the ink pack 14 is drawn out through the liquid supply port forming member 22 and the remaining amount of the liquid becomes zero, so-called near-end remaining amount slightly before the remaining amount becomes zero.
  • the reaction force of the film the force for depressurizing the inside of the ink pack 14 acting in the direction in which the volume inside the ink pack 14 expands is applied. This position is lower than the position at the most bulging position in the horizontal direction.
  • the apparatus main body 12 of the liquid ejecting apparatus 11 has a substantially box-shaped casing 25.
  • a support member 27 capable of supporting a sheet 26 which is an example of a target conveyed in a predetermined direction (a direction perpendicular to the sheet of FIG. 1) by a conveying device (not shown) There is.
  • the carriage 28 is disposed above the support member 27 in the housing 25 so as to be reciprocally movable in the main scanning direction (left and right direction in FIG. 1) with respect to the sheet 26.
  • a liquid storage portion 29 capable of storing liquid is mounted on the upper portion of the carriage 28, while a liquid jet head 30 for ejecting liquid is mounted on the lower portion of the carriage 28.
  • the liquid jet head 30 is disposed with its lower surface facing the upper surface of the support member 27.
  • a plurality of nozzle openings 31 (four nozzle openings 31 are shown by broken lines in FIG. 1) are formed, and the nozzle openings 31 are supported on a support member 27.
  • the liquid is jetted toward the paper 26. That is, the lower surface of the liquid jet head 30 is the nozzle forming surface 30 a in which the nozzle opening 31 for jetting the liquid is formed.
  • a liquid flow path (not shown) for supplying the liquid from the liquid storage portion 29 at the top is formed at the nozzle opening 31 opened at the nozzle formation surface 30a.
  • a meniscus is formed in the nozzle opening 31.
  • a meniscus is a curved liquid that occurs due to the magnitude of the adhesive force acting between the two molecules and the cohesion between the liquid molecules when the liquid is in contact with a solid surface (in this case, the inner surface of the nozzle opening 31)
  • the surface of the nozzle 31 is recessed toward the inner side.
  • the diameter of the nozzle opening 31 is 20 to 30 ⁇ m when the liquid is ink, the pressure resistance of the meniscus formed on the surface (gas-liquid interface) of the liquid in the nozzle opening 31 can be taken into account When converted to height, it is about 500 mm in calculation.
  • the position of the pressure head of the supplied ink is +100 mm (100 mm higher) to -300 mm (lower by 300 mm) in the vertical direction than the position of the nozzle opening 31. It is desirable to be set in the range of ⁇ 50 mm to 200 mm.
  • a hook portion 32 is provided at the upper part of the outer surface of one side wall (right side wall in FIG. 1) of the housing 25 and a through hole 33 is formed at the lower part of the one side wall There is.
  • the hook portion 32 outside the housing 25 holds the liquid supply unit 13 in a stationary state, and the through hole 33 penetrating one side wall of the housing 25 functions as a liquid supply flow path.
  • the tube 34 is inserted.
  • the liquid supply tube 34 is a flexible tubular member, and one end serving as the upstream end thereof is connected to the liquid supply unit 13 outside the housing 25 while the other end serving as the downstream end thereof is It is connected to the liquid reservoir 29 inside the body 25.
  • the liquid supply unit 13 includes a liquid introduction portion 35 and a pressure control valve portion 36.
  • the liquid supply unit 13 is located between the ink pack 14 and the liquid jet head 30 and has a function of supplying the liquid drawn from the ink pack 14 to the liquid jet head 30 side.
  • the liquid introduction unit 35 has a function of introducing the liquid drawn from the ink pack 14 into the liquid supply unit 13, and the pressure control valve unit 36 is configured to receive the pressure of the liquid introduced through the liquid introduction unit 35 (hereinafter (Also referred to as “hydraulic pressure”) and has a function of discharging it toward the liquid jet head 30.
  • the liquid introduction portion 35 in the liquid supply unit 13 includes a liquid introduction tube 37 which is a flexible tubular member (tube) and a liquid supply needle 38 attached to the upstream end of the tube 37. And a relay member 39 attached to the downstream end of the tube 37 as a main component.
  • the liquid supply needle 38 is formed with a flow passage 38a extending along its axis, and the relay member 39 is also formed with a flow passage 39a extending along the axis.
  • the passages 38a and 39a are connected to the flow passage 37a formed in the liquid introduction tube 37 to constitute a series of liquid flow passages.
  • the liquid supply port forming member 22 in the ink pack 14 is formed with a liquid lead-out passage 40 for leading the liquid from the pack main body 20.
  • the tip of a liquid supply needle 38 that functions as a liquid lead-out member is inserted into the liquid supply port 40 a configured by the downstream end opening of the liquid lead-out passage 40.
  • the liquid is easily introduced from the ink pack 14 to the pressure control valve portion 36 simply by inserting the tip of the liquid supply needle 38 of the liquid introduction portion 35 into the liquid supply port 40a of the ink pack 14. It is possible to Further, since the liquid introduction tube 37 of the liquid introduction portion 35 is a flexible tube, the position of the liquid supply port 40 a of the ink pack 14 is in relation to the size and shape of the ink pack 14, It is possible to cope by deforming the flow path shape.
  • an annular seal member 41 surrounding the downstream opening of the flow path 39a of the relay member 39 is attached to a position opposite to the liquid introduction tube 37.
  • the pressure control valve unit 36 has a valve unit main body 45 for introducing a liquid from the ink pack 14 side and discharging the liquid to the liquid jet head 30, and a housing in a state of holding the valve unit main body 45. And a holding portion 46 which is hooked to the hook portion 32 of 25.
  • the holding portion 46 has a shape of a case body in which the valve portion main body 45 can be assembled, and a through hole 48 is formed through a projecting piece portion 47 which is protruded from a part (upper part in FIG. 3).
  • the hook portion 32 is inserted into the insertion hole 48, so that the holding portion 46 holds the valve portion main body 45 assembled below the projecting piece portion 47 with respect to the nozzle opening 31 of the liquid jet head 30 in the vertical direction. It is held at a predetermined height position P having a head difference L.
  • the value of L is set to a value at which a good meniscus can be formed at the nozzle opening 31.
  • the valve body 45 has a bottomed box shape having a bottom plate 45a and a peripheral wall 45b, and a pressure chamber having a relatively small volume with the liquid introduction chamber 50 whose volume is relatively small by the partition wall 49. It is divided into 51 and.
  • An opening on the opposite side to the bottom plate portion 45 a in the liquid introduction chamber 50 is closed by the lid member 52.
  • the lid member 52 is formed with a liquid introduction port 53 for communicating the liquid introduction chamber 50 with the outside.
  • the annular seal member 41 in the liquid introduction portion 35 is joined to the lid member 52 so as to surround the opening on the opposite side to the side facing the liquid introduction chamber 50 in the liquid introduction port 53.
  • a film member 54 which is an example of a flexible portion having flexibility.
  • the film member 54 is a thin film made of a flexible material such as synthetic resin or rubber, and constitutes a part of the pressure chamber 51 (in this case, a wall surface facing the bottom plate portion 45 a of the pressure chamber 51). Then, with the introduction of the liquid into the pressure chamber 51 and the discharge of the liquid from the inside of the pressure chamber 51, the film member 54 is deformed so as to increase or decrease the volume of the pressure chamber 51.
  • the position P of the height of the film member 54 (the height of the central portion of the film member 54 in the vertical direction when the pressure control valve portion 36 is in the posture of FIG.
  • the liquid is held in the range where the meniscus can be formed in the nozzle opening 31.
  • a pressure-receiving member 55 having a bottomed cylindrical shape is disposed on the surface (that is, the inner surface) of the film member 54 on the side facing the pressure chamber 51.
  • the pressure receiving member 55 has a bottom plate 55a and a peripheral wall 55b.
  • the pressure receiving member 55 is disposed such that the outer surface of the bottom plate 55 a can contact the inner surface of the film member 54.
  • a coil spring 56 is interposed between the inner surface of the bottom plate 55 a of the pressure receiving member 55 and the inner surface of the bottom plate 45 a of the valve body 45.
  • the coil spring 56 is an example of a biasing member that biases the film member 54 in the direction in which the volume of the pressure chamber 51 increases via the pressure receiving member 55.
  • the outer surface of the bottom plate 55a comes in contact with the inner surface of the film member 54.
  • the biasing force of the coil spring 56 forms a back pressure in the liquid supply direction with respect to the nozzle opening 31 in order to form a uniform meniscus at the nozzle opening 31 and stabilize the liquid ejection operation.
  • the pressure is adjusted to be a weak negative pressure.
  • a cylindrical portion 57 protrudes toward the outside of the valve body 45 on the wall opposite to the partition wall 49 with the pressure chamber 51 interposed therebetween.
  • a liquid outlet 58 for communicating the pressure chamber 51 with the outside is formed to extend along the axis of the cylindrical portion 57.
  • the upstream end of the liquid supply tube 34 is connected to the cylindrical portion 57 in which the liquid discharge port 58 is formed through.
  • a communication port 59 for communicating the liquid introduction chamber 50 with the pressure chamber 51 is formed through the partition wall 49 of the valve body 45.
  • a pivot shaft 60 is provided at a position facing the communication port 59 of the partition 49 on the inner surface of the liquid introduction chamber 50, and the proximal end of the lever member 61 is fixed to the pivot shaft 60. .
  • the lever member 61 is pivotable about the pivot shaft 60 as a pivot.
  • the lever member 61 has such a length that the tip end thereof is inserted into the communication port 59 of the partition wall 49 and reaches the inside of the pressure chamber 51.
  • the lever member 61 has such a length that the tip end thereof is located at a position facing the peripheral wall 55 b of the pressure receiving member 55 in the expansion and contraction direction of the coil spring 56. There is.
  • a valve body 62 made of an elastic member such as rubber is attached to the side of the lever member 61 located in the liquid introduction chamber 50 and facing the liquid introduction port 53.
  • a coil-shaped seal spring 63 is provided between the portion of the lever member 61 opposite to the portion where the valve body 62 is attached and the bottom plate 45a of the valve body 45. It is interspersed.
  • the seal spring 63 biases the lever member 61 in a direction in which the valve body 62 is in close contact with the lid member 52, that is, a valve closing direction in which the liquid inlet 53 is closed.
  • the operation of the liquid supply unit 13 configured as described above and the liquid ejecting apparatus 11 including the unit will be described with reference to the drawings.
  • the inside of the pressure chamber 51 of the pressure control valve portion 36 in the liquid supply unit 13 is introduced from the ink pack 14 through the liquid introduction portion 35, the liquid introduction port 53, the liquid introduction chamber 50 and the communication port 59. It shall be in the state filled with the liquid. In that case, the pressure receiving member 55 is in the state shown in FIG.
  • the liquid in the pressure chamber 51 is in a weak negative pressure state, and the resultant force of the negative pressure and the biasing force of the coil spring 56 balances with the atmospheric pressure to separate the film member 54 from the bottom plate 45 a of the valve body 45 Since the pressure receiving member 55 is biased in the direction, it is assumed that the pressure receiving member 55 is separated from the tip end of the lever member 61. Then, when the seal spring 63 biases the lever member 61, the valve body 62 is in close contact with the lid member 52, and the liquid introduction port 53 is closed.
  • the valve body 62 in the pressure control valve portion 36 closes the liquid inlet 53, the flow of liquid from the ink pack 14 side to the liquid jet head 30 side is stopped. Therefore, for example, when the ink pack 14 is constituted by the large-capacity pack body 20, the position of the pressure head of the liquid contained in the ink pack 14 is higher than the nozzle opening 31 in the vertical direction. Even when the pressure is higher than the pressure resistance of the meniscus formed inside, the liquid is prevented from leaking out of the nozzle opening 31. Further, in the case of the ink pack 14 of the closed type flexible container, when the liquid remaining amount exceeds the near end remaining amount, the reaction force of the film acting in the direction of expanding the volume in the ink pack 14 acts.
  • the negative pressure in the ink pack 14 may be increased, and a negative pressure larger than the pressure resistance of the meniscus may act on the meniscus formed in the nozzle opening 31. Even in such a case, since the valve body 62 closes the liquid introduction port 53, the withdrawal of the liquid due to the negative pressure is suppressed.
  • the valve body 62 in the pressure control valve portion 36 closes the liquid inlet 53, whereby the flow of liquid from the ink pack 14 side to the liquid jet head 30 side is stopped.
  • the pressure of the liquid contained in the ink pack 14 causes the liquid discharge port 58 of the pressure control valve portion 36 to It is suppressed that the liquid leaks out or draws in air.
  • the film member 54 constituting one wall surface of the pressure chamber 51 reduces the volume of the pressure chamber 51 by the differential pressure between the hydraulic pressure of the pressure chamber 51 and the atmospheric pressure in such a large negative pressure state. Try to bend in the direction of Then, when the bending force becomes larger than the biasing force of the coil spring 56, the film member 54 is bent and deformed to the inside of the pressure chamber 51. As a result, the pressure receiving member 55 as well as the film member 54 is displaced to the inside of the pressure chamber 51 while contracting the coil spring 56.
  • the peripheral wall 55 b of the pressure receiving member 55 contacts the tip of the lever 61 in the pressure chamber 51. Then, if the liquid pressure in the pressure chamber 51 is further reduced from this state and the fluid pressure in the pressure chamber 51 is further reduced, the film member 54 is further bent and deformed to the inside of the pressure chamber 51, as shown in FIG.
  • the pressure receiving member 55 is also displaced to the inside of the pressure chamber 51 while contracting the coil spring 56.
  • the lever member 61 is swung with the pivot shaft portion 60 as a fulcrum by being pressed by the pressure receiving member 55 thus largely displaced. That is, the lever member 61 pivots in the direction in which the valve body 62 is separated from the lid member 52, that is, in the valve opening direction in which the valve body 62 opens the liquid introduction port 53.
  • the liquid is introduced from the ink pack 14 into the liquid introduction chamber 50 through the open liquid introduction port 53, and is further introduced into the pressure chamber 51 from the liquid introduction chamber 50 through the communication port 59.
  • the film member 54 is bent and deformed in the direction of increasing the volume of the pressure chamber 51.
  • the biasing force of the coil spring 56 displaces the pressure receiving member 55 in the direction away from the lever member 61, and the lever member 61 pivots in the closing direction of the valve 62 by the biasing force of the seal spring 63 again.
  • the pressure control valve part 36 returns to the state shown to Fig.4 (a).
  • the pressure adjusting valve portion 36 is again in the state of FIG. 4A and the state of FIG. 4B. repeat.
  • the fluid pressure in the pressure chamber 51 is maintained at a predetermined pressure lower than the atmospheric pressure when the valve body 62 attached to the lever member 61 opens.
  • the predetermined pressure is the biasing force of the coil spring 56, the force required to deform the film member 54, the force necessary to deform the seal portion of the valve body 62 to the closed state, the biasing force of the seal spring 63,
  • the distance can be changed by appropriately setting the distance between the pivot shaft portion 60 of the lever member 61 and the valve body 62 and the distance between the pivot shaft portion 60 and the tip portion contacting the pressure receiving member 55 of the lever member 61.
  • the position P corresponds to the position 100 mm lower than the position P in the vertical direction when the value obtained by converting the predetermined pressure into pressure head corresponds to the position of the nozzle opening 31
  • valve body 62 attached to the lever member 61 responds to the deformation of the film member 54 as the flexible portion, and the liquid from the ink pack 14 side through the liquid introduction port 53. It functions as an on-off valve that allows introduction to the pressure chamber 51 side.
  • a pressure control valve portion 36 having a pressure control function of liquid is provided between the ink pack (liquid supply source) 14 and the liquid jet head 30. Therefore, even when the ink pack 14 is disposed without regard to the height difference with the position of the nozzle opening 31 in the liquid jet head 30, the liquid may leak from the nozzle opening 31 or the liquid may be normally discharged to the liquid jet head 30. It can suppress that it is not supplied by the function of the pressure control valve part 36. Therefore, the liquid can be stably supplied from the ink pack 14 to the liquid jet head 30 without being limited by the volume and the form of the ink pack 14.
  • the pressure control valve unit 36 sequentially supplies the liquid to the liquid jet head 30 according to the amount of the liquid jetted from the liquid jet head 30. Therefore, the pressure state in the pressure chamber 51 forming the back pressure of the nozzle opening 31 can be maintained at a negative pressure, and the collapse of the meniscus of the liquid at the nozzle opening 31 can be suppressed. Therefore, the meniscus formed by the liquid at the nozzle opening 31 can be stabilized, and the quality of the ejection characteristics of the liquid ejection head 30 can be kept constant.
  • the liquid introducing portion 35 which functions as a flow path for introducing the liquid from the ink pack (liquid supply source) 14 to the pressure control valve portion 36 mainly includes the flexible liquid introducing tube 37.
  • the flow path shape can be freely deformed and connected to the liquid supply port 40 a of the pack 14. Therefore, the form and position of the ink pack 14 can be freely set.
  • the pressure control valve unit 36 carries out the introduction of the liquid to the pressure chamber 51 whose partial wall surface is constituted by the flexible film member 54 and the discharge of the liquid from the pressure chamber 51.
  • the pressure control valve portion 36 is held at a predetermined height position at which the positional relationship of the liquid jet head 30 with respect to the nozzle opening 31 does not change. Therefore, since the position of the pressure control valve portion 36 does not fluctuate unstably, the liquid can be stably supplied from the pressure control valve portion 36 to the liquid jet head 30, and the liquid is stably stabilized at the nozzle opening 31. Can be formed.
  • the present embodiment is different in that the liquid supply source is not a closed type flexible container but a container having a fixed shape in which an air communication passage is formed.
  • the configuration is almost the same. Therefore, in the following, differences from the first embodiment will be mainly described, and redundant description of the same configuration will be omitted.
  • a liquid tank 71 having a predetermined shape is used as a liquid supply source.
  • the liquid tank 71 is supported by a support stand 70 of a predetermined height, which is disposed on the floor F to the side of the liquid ejecting apparatus 11.
  • the liquid stored in the liquid storage section 71 a of a fixed volume formed inside the liquid tank 71 is supplied to the liquid jet head 30 via the liquid supply unit 13.
  • a liquid inlet 72 used when adding liquid to the liquid storage portion 71a is formed in a part of the liquid tank 71 (the upper wall of the tank in FIG. 5).
  • the inlet 72 can be closed by a cap 80, and the cap 80 is removed from the inlet 72 when the liquid is injected.
  • the atmosphere communication passage is formed of a serpentine path in which the passage cross-sectional area is finely formed to allow passage of a gas such as air while restricting passage of a liquid such as ink.
  • a hole may be formed through the upper wall of the liquid tank 71 and the like, and the hole may be closed by a filter member made of a gas permeable membrane or the like which allows passage of gas while restricting passage of liquid. It is also good.
  • the pressure of the liquid supply unit 13 is applied to the outer surface of the wall portion (lower wall portion) positioned downward in the vertical direction when the liquid tank 71 is supported on the support 70.
  • a locking portion 81 capable of locking the adjustment valve portion 36 and holding it in a stationary state is provided.
  • the position P of the height of the film member 54 (the height of the outer surface of the central portion of the film member 54 when the pressure control valve portion 36 is in the posture of FIG. 5) is the nozzle opening 31 of the liquid jet head 30 in the vertical direction. It is determined that the liquid can form a meniscus in the nozzle opening 31 on the basis of the height position of.
  • liquid tank 71 a position of the liquid tank 71 opposite to the liquid introduction port (not shown) of the pressure control valve portion 36 in the state of being held by the locking portion 81 in the vertical direction.
  • a liquid supply port 40a for discharging the liquid from the liquid storage unit 71a is formed.
  • the liquid supply port 40a and the liquid introduction port of the pressure control valve unit 36 are connected so as to be able to supply and introduce liquid in a state where the periphery is sealed by the seal member 41.
  • a pressure control valve unit 36 having a pressure control function of liquid is provided between the liquid tank (liquid supply source) 71 and the liquid jet head 30. Therefore, even in the case where the liquid tank 71 is disposed without regard to the difference in level between the level of the liquid contained in the liquid storage portion 71a in contact with the atmosphere and the position of the nozzle opening 31 in the liquid jet head 30, Leakage of liquid from the nozzle opening 31 can be suppressed by the function of the pressure control valve portion 36. Therefore, the liquid can be stably supplied from the liquid tank 71 to the liquid jet head 30 without being limited by the volume and the form of the liquid tank 71.
  • a plurality of columnar support portions 73 are provided at positions between the support 70 on which the liquid tank 71 is supported on the floor F and the housing 25 of the liquid ejecting apparatus 11. Is provided.
  • the supports 73 hold the pressure control valve portion 36 of the liquid supply unit 13 stationary at a position spaced upward from the floor F.
  • the position P of the height of the film member 54 (the height of the outer surface of the central portion of the film member 54 when the pressure control valve portion 36 is in the posture of FIG. 6) is the nozzle opening 31 of the liquid jet head 30 in the vertical direction. It is determined that the liquid can form a meniscus in the nozzle opening 31 on the basis of the height position of.
  • the liquid inlet (not shown) of the pressure control valve 36 and the liquid supply port 40a of the liquid tank 71 are connected by a liquid inlet 35 formed of a flexible tube or the like.
  • the liquid supply source is not the stationary liquid tank 71 having the inlet 72, but the cartridge type liquid container 75 that can be replaced by attaching and removing.
  • the liquid supply source is not the stationary liquid tank 71 having the inlet 72, but the cartridge type liquid container 75 that can be replaced by attaching and removing.
  • the liquid container mounting portion 74 is provided on the support 70, and the liquid container 75 is detachably attached to the liquid container mounting portion 74 from above.
  • a liquid supply port 40 a is formed in the lower part of the liquid container 75.
  • a locking portion 74a is provided on the lower surface side of the bottom wall of the liquid container mounting portion 74, and the pressure adjustment valve portion 36 of the liquid supply unit 13 remains stationary by being locked to the locking portion 74a. It is held.
  • liquid is supplied to the position vertically opposed to the liquid inlet (not shown) of the pressure control valve portion 36 held by the locking portion 74a.
  • a needle 38 is provided so that its tip is directed upward in the liquid container mounting portion 74.
  • the lower end of the liquid supply needle 38 and the liquid introduction port of the pressure control valve portion 36 are connected in a state where the periphery is sealed by the seal member 41. Therefore, as shown by a solid line and a two-dot chain line in FIG. 7, when the liquid container 75 is mounted on the liquid container mounting portion 74 from above, the liquid supply needle 38 is inserted into the liquid supply port 40a of the liquid container 75. The liquid is drawn from the liquid container 75 to the pressure control valve 36 side.
  • the liquid supply unit 13 including the pressure control valve portion 36 and the like is attached to the inside of the liquid container mounting portion 74 provided in the housing 25 of the apparatus main body 12
  • the other points are substantially the same. Therefore, in the following, differences from the first embodiment will be mainly described, and redundant description of the same configuration will be omitted.
  • a liquid supply needle 38 is provided on the partition wall 77 in the innermost portion of the liquid container mounting portion 74 in the liquid ejecting apparatus 11.
  • the pressure control valve portion 36 is held with the liquid discharge port (not shown) inserted into the liquid supply needle 38. Therefore, the pressure control valve unit 36 introduces the liquid introduced from the liquid supply source provided outside the liquid ejecting apparatus 11 through the liquid introducing unit 35 from the liquid supply needle 38 through the liquid supply tube 34 and the liquid storage unit 29. To the liquid jet head 30.
  • the liquid supply unit 13 can be stably held using the liquid container mounting portion 74 in the existing liquid jet apparatus 11 having the liquid container mounting portion 74 in a part of the housing 25.
  • FIG. 1 Sixth Embodiment Next, a sixth embodiment will be described using FIG.
  • the present embodiment is different from the fifth embodiment in that the liquid supply unit 13 having the liquid introduction portion 35 and the pressure adjustment valve portion 36 is integrally formed with the liquid container 75.
  • the configuration is almost the same. Therefore, in the following, differences with the fifth embodiment will be mainly described, and redundant description of the same configuration will be omitted.
  • the liquid container 75 in the present embodiment is internally divided into two chambers of a liquid storage portion 75a and a unit storage portion 75b, and the liquid storage portion 75a is an inlet 72 which can be closed by a cap 80. Is provided.
  • a cylindrical portion 79 communicating the inside and the outside is provided in the wall portion opposite to the liquid storage portion 75a in the unit storage portion 75b, and the pressure adjustment valve portion of the liquid supply unit 13 with respect to the inner end of the cylindrical portion 79 36 is supported in a state in which a liquid outlet (not shown) is in communication.
  • the liquid introducing unit 35 of the liquid supply unit 13 is connected to the liquid storage unit 75a so as to introduce the liquid.
  • the effects (1) to (6) of the first embodiment can be obtained.
  • the liquid introduction unit 35 may not have the liquid introduction tube 37.
  • the liquid inlet 53 and the liquid supply port 40 a may be directly connected via the liquid supply needle 38 or the seal member 41.
  • the liquid introduction tube 37 which is the main component of the liquid introduction portion 35, may have a non-flexible structure.
  • a pipe or the like having a rigid fixed shape may be used.
  • the on-off valve of the pressure regulating valve unit 36 is not limited to the pressure reducing valve that opens and closes by the difference between the pressure in the pressure chamber 51 and the atmospheric pressure.
  • it may be a differential pressure valve that opens and closes by the difference in pressure between the pressure chamber 51 and the liquid introduction chamber 50.
  • the liquid introduction chamber 50 is not necessarily required.
  • the partition wall 49 and the communication port 59 may not be provided, and only the pressure chamber 51 may be defined in the valve body 45 by the bottom plate 45 a, the peripheral wall 45 b, and the film member 54.
  • the liquid reservoir 29 is not necessarily required.
  • the pressure control valve portion 36 and the liquid jet head 30 may be directly connected via the liquid supply tube 34.
  • a biasing member such as a coil spring is further provided on the outside of the film member 54 of the pressure control valve portion 36 in order to bias the film member 54 in the direction in which the volume of the pressure chamber 51 decreases.
  • the pressure adjusting valve portion 36 may not be provided with the separate holding portion 46.
  • the pressure control valve portion 36 may be fixed directly to the outer surface of the housing 25 of the device body 12 with a tape or the like. In this case, the portion fixed by the tape of the pressure control valve portion 36 corresponds to the holding portion.
  • the liquid supply tube 34 when the liquid supply tube 34 is attachable to and detachable from the apparatus body 12, the liquid supply tube 34 may be included in the liquid supply unit. In the first to sixth embodiments, when the liquid storage unit 29 and the liquid supply tube 34 can be attached to and detached from the apparatus main body 12, the liquid storage unit 29 and the liquid supply tube 34 may be included in the liquid supply unit. Good.
  • the pressure receiving member 55 may not have a bottomed cylindrical shape.
  • it may be a thick disc.
  • the liquid ejecting apparatus 11 may be a line head type in which the liquid ejecting head 30 does not scan the sheet 26.
  • the liquid supply tube 34 may be made of a non-flexible material such as a stainless steel pipe.
  • the liquid ejecting apparatus may be a liquid ejecting apparatus that ejects or discharges a liquid other than ink.
  • the liquid referred to here may be any material that can be ejected from the liquid ejecting apparatus. For example, it may be in the state when the substance is in the liquid phase, and high or low viscosity liquids, sols, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melt Should contain a fluid such as).
  • liquid not only liquid as one state of substance but also particles of functional material consisting of solid matter such as pigment and metal particles are considered to be dissolved, dispersed or mixed in a solvent.
  • the liquid include the ink described in the above embodiment, liquid crystal, and the like.
  • the ink includes general aqueous inks and oil-based inks, and various liquid compositions such as gel inks and hot melt inks.
  • Specific examples of the liquid ejecting apparatus include, for example, a liquid containing materials such as an electrode material and a coloring material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, a color filter, etc. in the form of dispersion or dissolution.
  • a liquid injection device that injects
  • it may be a liquid ejecting apparatus that ejects a bioorganic substance used for producing a biochip, a liquid ejecting apparatus that is used as a precision pipette and ejects a liquid to be a sample, a textile printing apparatus, a micro dispenser, or the like.
  • a transparent resin liquid such as an ultraviolet curable resin is used to form a liquid ejecting apparatus that injects lubricating oil at precise points, such as watches and cameras, and micro hemispherical lenses (optical lenses) used for optical communication elements and the like.
  • It may be a liquid ejecting apparatus that ejects onto the substrate.
  • it may be a liquid ejecting apparatus that ejects an etching solution such as acid or alkali to etch a substrate or the like.
  • the present invention can be applied to any one of these liquid ejecting apparatuses.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Ink Jet (AREA)
PCT/JP2015/066914 2014-07-01 2015-06-11 液体供給ユニット及び液体噴射装置 WO2016002472A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15815636.4A EP3138690B1 (en) 2014-07-01 2015-06-11 Liquid supply unit and liquid jet device
PH12016502157A PH12016502157A1 (en) 2014-07-01 2016-10-28 Liquid supply unit and liquid ejection device

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JP2014135648A JP6535986B2 (ja) 2014-07-01 2014-07-01 液体供給ユニット及び液体噴射装置
JP2014-135648 2014-07-01

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EP3138690B1 (en) 2020-11-04
US20160001567A1 (en) 2016-01-07
JP2016013628A (ja) 2016-01-28
EP3138690A1 (en) 2017-03-08
CN105313477A (zh) 2016-02-10
US9346281B2 (en) 2016-05-24
JP6535986B2 (ja) 2019-07-03
CN105313477B (zh) 2019-10-01
EP3138690A4 (en) 2018-01-24
PH12016502157A1 (en) 2016-12-19

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